题解 | #大数加法#
大数加法
https://www.nowcoder.com/practice/11ae12e8c6fe48f883cad618c2e81475
import java.util.*; public class Solution { /** * 代码中的类名、方法名、参数名已经指定,请勿修改,直接返回方法规定的值即可 * * 计算两个数之和 * @param s string字符串 表示第一个整数 * @param t string字符串 表示第二个整数 * @return string字符串 */ public static String solve (String s, String t) { // write code here StringBuilder sbs = new StringBuilder(s); StringBuilder sbt = new StringBuilder(t); StringBuilder res = new StringBuilder(); int carry = 0; while (sbs.length() != 0 || sbt.length() != 0) { int a = 0; int b = 0; if (sbs.length() != 0) { //字符变整形-‘0’ a = sbs.charAt(sbs.length() - 1) - '0'; sbs.deleteCharAt(sbs.length() - 1); } if (sbt.length() != 0) { b = sbt.charAt(sbt.length() - 1) - '0'; sbt.deleteCharAt(sbt.length() - 1); } int sum = a + b + carry; res.append(sum % 10); carry = (a + b + carry) / 10; } if (carry > 0) { res.append(1); } String r = res.reverse().toString(); return r; } }